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For the Inventor, By the Inventor

Chikuma, Japan

Hakko Co., Ltd.

USPTO Granted Patents = 15

% Expired Patents = 13.3


Forward Citations = 203

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22 inventors (with patents filed for the assignee):

goldMedal Motoyuki Koga (7 out of 7 patents)

silverMedal Ubao Jibiki (3 out of 3 patents)

bronzeMedal Yukihiko Tamai (2 out of 2 patents)

4.  Kenji Ohshima (2 out of 2 patents)

5.  Nobukatsu Ike (2 out of 2 patents)

6.  Kiyokazu Nakajima (1 out of 9 patents)

7.  Masaomi Agatsuma (1 out of 1 patent)

8.  Hidenori Takagi (1 out of 1 patent)

9.  Shun Nitta (1 out of 1 patent)

10.  Toru Urano (1 out of 1 patent)

11.  Shigemitsu Hayashi (1 out of 1 patent)

12.  Yoshihisa Miyamoto (1 out of 1 patent)

13.  Mitsutoshi Hayashi (1 out of 8 patents)

14.  Akio Morinaga (1 out of 13 patents)

15.  Isao Saito (1 out of 9 patents)


15 patents:

1. 11241249 - Endoscopic snare (2022-02-08),
2. 8936550 - Eyelids opening device with drape (2015-01-20),
3. D678523 - Access device for endoscopic surgery (2013-03-19),
4. 6725563 - Drying method, drying device, and drying machine (2004-04-27),
5. 6598332 - Riflescope with adjustable eyepiece (2003-07-29),
6. 6131294 - Telescopic sight with detachable night vision apparatus (2000-10-17),
7. 5764410 - Telescope including an interposition gear for zoom operation (1998-06-09),
8. 5590689 - Method for lining the internal surface of a pipe (1997-01-07),
9. 5089297 - Method for repairing interior portions of a pipeline (1992-02-18),
10. 4584963 - System for repairing joints in pipes laid underground (1986-04-29),
11. 4556580 - Method of repairing pipes laid underground (1985-12-03),
12. 4505613 - Method for lining pipes in pipelines (1985-03-19),
13. 4504204 - Pig for repairing interior portions of a pipeline (1985-03-12),
14. 4454174 - Method for lining pipes of a pipeline (1984-06-12),
15. 4454173 - Method for lining pipes in a pipeline (1984-06-12),
Company Overview
Hakko Co., Ltd. is a prominent manufacturer based in Chikuma, Japan, specializing in the development of high-quality soldering and desoldering equipment. The company is recognized for its innovative solutions in the electronics industry, providing tools that enhance precision and efficiency in various applications. Hakko's expertise extends to a range of technologies, including thermal management and assembly processes, making it a key player in supporting the evolving needs of electronics manufacturing globally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

15 Patents

#1 in Chikuma

#3,447 in Japan

#39,959 in the World

Chikuma, JP
Chikuma, Japan

Hakko Co., Ltd.

Forward Citations = 203

22 inventors:

goldMedal Motoyuki Koga (7 out of 7 patents)

silverMedal Ubao Jibiki (3 out of 3 patents)

bronzeMedal Yukihiko Tamai (2 out of 2 patents)

4.  Kenji Ohshima (2 out of 2 patents)

5.  Nobukatsu Ike (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hakko Co., Ltd.. Retrieved from https://idiyas.com/company/hakko-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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